I'm a big F body Pontiac fan, the '75-'81 body style being my favorite, And There were 6 options in F body Pontiacs:
1977 Model year
Model
Base model Firebird V6- $4269- production 30,642 both V6 & V8
Base model Firebird V6- $4334
Firebird Esprit V6- $4550- production 34,548 both V6 & V8
Firebird Esprit V8- $4615
Firebird Formula- $4976- production 21,801
Trans Am- $5456- production 68,745
Options
301-cid V-8 $65
350-cid four-barrel V-8 (Firebird) $155
350-cid four-barrel V-8 (Formula) $90
400-cid four-barrel V-8 (Formula) $155 - $205
400-cid four-barrel V-8 (Trans Am) $50
Four-speed manual transmission (Firebird) $257
Turbo-Hydra-Matic $248
Safe-T-Track differential $54
Rally RTS handling package $46 - $116
Heavy-duty battery $16 - $18
Maintenance-free battery $31
Heavy-duty alternator $45
Engine block heater $12 - $13
Esprit Skybird appearance package $325 - $342
Trans Am Special Edition $556 - $1143
Firebird custom trim group $27 - $118
Formula appearance package $127
Air conditioning $442 - $540
Cruise control $80 - $84
Power windows $108 - $151
Glass sunroof $587
Canopy top $105
Rear spoiler $51
Introduced Sept. 30, 1976
1978 Model Year
Model
Base model Firebird V6- $4545- production 32,672 both V6 & V8
Base model Firebird V8- $4695
Esprit V6- $4842- production 36,926 both V6 & V8
Esprit V8- $4992
Formula- $5448- production 24,346
Trans Am- $5799- production 93,341
Options
305-cid four-barrel V-8 $150
350-cid four-barrel V-8 (Firebird) $265
350-cid four-barrel V-8 (Formula) $115
400-cid four-barrel V-8 (Formula) $280
403-cid four-barrel V-8 (Formula) $205
Four-speed manual floor shift transmission $125
Four-speed manual floor shift transmission $182 credit
Turbo-Hydra-Matic transmission $270
Turbo-Hydra-Matic transmission N/C
Safe-T-Track differential $60
Power brakes $60
Heavy-duty alternator $31
Engine block heater $13
Esprit "Skybird" appearance package $426 - $461
Trans Am special edition $1259
Firebird custom trim group $35 - $154
Formula appearance package $137
Trans Am special performance package $249 - $324
Air conditioning $470 - $581
Cruise control $90 - $95
Power windows $118 - $190
Hatch roof $625
Canopy top $111
Introduced Oct. 6, 1977
I've all ready built a '77 Trans am and a '78 Firebird Esprit V8, so that leaves a '78 Firebird formula and a '77 Base model V8